Malicious PDF — malware analysis report

Static analysis result for SHA-256 a30eb0b70dbd7f89…

MALICIOUS

PDF

59.4 KB Created: 2021-06-03 09:33:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 303ee6f13dd27e70f3e783e734b61b37 SHA-1: 7370cec70640f5c00e1073062007e95887c7c6f4 SHA-256: a30eb0b70dbd7f89f802b05813f01087191b91f07030c007281b8e9170cd9242
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are structured as SEO-optimized links pointing to resources related to game hacks and cheats. The presence of a "download button" heuristic and the ML classifier's high confidence score indicate a malicious intent to trick users into downloading unwanted applications. The document body, though partially corrupted, contains a URL pointing to a "hack-version-coin-master-apk-game-hack", reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9504

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.online/app/406889139/hack-version-coin-master-apk-game-hack PDF link annotation
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/robux-converter_GM431946152.pdfIn PDF document text
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/coin-master-free-spin-redeem-code_GM406889139.pdfIn PDF document text
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/coin-master-free-spins-2021-blogspot_GM406889139.pdfIn PDF document text
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/how-to-play-minecraft-with-friends-for-free_GM479516143.pdfIn PDF document text
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/pubg-uc-yatrma-sitesi_GM1330123889.pdfIn PDF document text
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/freespinandcoin-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/free-100-robux_GM431946152.pdfIn PDF document text
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/coin-master-hack-dot-xyz_GM406889139.pdfIn PDF document text
    • https://digilib-akuntansi.stkip-pgri-sumbar.ac.id//repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000054bc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54BC 29964 bytes
SHA-256: 88e568a551131005d1731e2b50bf5539a1c9f41a776d10cd85bd62d3e76d1741
font_01_sfnt_off000099d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99D3 3088 bytes
SHA-256: 21947db80f63681192ff4d23c9293372afcdd8455d0079c5ca62ec2c2320d79e
font_02_sfnt_off0000a49e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA49E 7960 bytes
SHA-256: cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2
font_03_sfnt_off0000b7c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7C4 18028 bytes
SHA-256: 3f168c1f6698dcf2dd7090d469e87ca8ddd6c2d99ef7bd4e7b306b99a7cfc93f
font_04_sfnt_off0000d917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD917 4272 bytes
SHA-256: fac9a06ceb5574feb8580c075df3ef69dfbd0efa4947186cfe90f11b68eaafb0

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